Adaptive Gate Delay-Time Control of Si/SiC Hybrid Switch for Efficiency Improvement in Inverters
Adaptive Gate Delay-Time Control of Si/SiC Hybrid Switch for Efficiency Improvement in Inverters
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DOI：
10.1109/tpel.2020.3015803
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发表时间：
2021-03-01
影响因子：
6.7
通讯作者：
Shen, Z. John
中科院分区：
文献类型：
--
作者：
Peng, Zishun;Wang, Jun;Shen, Z. John
由于硅绝缘栅双极晶体管/碳化硅MOSFET混合开关的结温和工作电流的时变特性，改变其栅极延迟时间是实现硅/碳化硅混合开关功率转换器高效率的关键。提出了一种基于群体智能算法的逆变器硅/碳化硅混合开关的自适应延迟时间控制方法，以获得比传统固定延迟时间更高的效率。此外，通过评估适应值，该方法无需建立基于物理的器件损耗分析模型和额外的硬件支持即可轻松实现这一目标。搭建了基于硅/碳化硅混合开关的单相逆变器实验平台，并以粒子群优化算法为例进行了验证。实验结果表明，与固定延迟时间相比，该方法使单相逆变器的总损耗降低了6.2%。
Varying gate delay time of the Si insulated-gate bipolar transistor/SiC MOSFET hybrid switch is the key to achieving high efficiency of Si/SiC-hybrid-switch-based power converters because of time-varying characteristics of its junction temperature and operation current. Based on the swarm intelligent algorithm, a novel adaptive delay-time control method of the Si/SiC hybrid switch in an inverter is proposed to achieve higher efficiency than the traditional fixed delay time. In addition, by evaluating the fitness values, the proposed method can easily achieve this goal without establishing the physics-based analytical model of device loss and additional hardware support. The platform of the Si/SiC-hybrid-switch-based single-phase inverter is established and tested, and the particle swarm optimization algorithm is taken as example. Experimental results demonstrate that the proposed technique yields 6.2% reduction in the total loss of the single-phase inverter compared to a fixed delay time.